The STIHL RB 400 DIRT BOSS® pressure washer features a powerful 196 cc (6.5 hp) engine, delivering 2,700 psi of water pressure at 2.7 gallons per minute. It’s got the power you need for heavy-duty cleaning of sidewalks, driveways, decks and more. The RB 400 DIRT BOSS® is also built to last, including a brass manifold pump design, stainless steel valves and ceramic-coated pistons. There is also a c...Read More

Model Features

Easy Start Pump SystemThe Easy Start Pump System features a pressure relief valve, allowing users to start the unit without any back pressure from the pump. It enables quick, easy starting with no hard cord pulls.

Stainless Steel High Pressure & Brass Detergent NozzlesThis pressure washer includes stainless steel nozzles for use with high-pressure water and a brass nozzle for use with detergent. These premium nozzles are designed to resist corrosion and wear.

Easy-Access Inlet & Outlet Water ConnectionsBoth inlet (water coming into the pump) and outlet (water going from the pump to the gun) connections are easy to access for faster setup

Automatic Fuel Shut-Off Valve
This pressure washer features a combined on/off and fuel valve control. This allows the user to shut unit off and close fuel valve automatically for easy, no-mess transport.

Anti-Vibration System
This pressure washer features a STIHL-engineered 4-point vibration isolation system. This reduces pump vibration during use for increased unit longevity.

Important Information

WARNING! Improper use of any power tool may cause serious
or fatal injury. Read, understand and follow carefully the operating
and safety instructions in your instruction manual before using such products.

STIHL products sold through U.S. STIHL Dealers are for distribution in the United States only.

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This rotating zero-degree nozzle delivers aggressive cleaning of stubborn stains and gum removal. Only compatible with the STIHL RB 200 and RB 400 pressure washers, this nozzle delivers a high-pressure jet stream of 3000 maximum psi. With the cleaning power of this accessory, you can expect to increase your cleaning output and cut down on your cleaning time. Buy one today at our Dealership!

For Your Safety

Top-quality hearing protection you can keep in your pocket. NRR 27 Reusable Ear Plugs from STIHL feature multiple layers of air cushioning for superior noise reduction and long-lasting comfort. Their tapered design provides a secure seal that keeps you protected almost anywhere – from the shooting range to the job site. And thanks to the included nylon cord and carrying case, you can keep your ear plugs handy for the long haul.

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Distributor Suggested Retail Price

All pricing on this site is Distributor Suggested Retail Price. This site strives to maintain accurate and current suggested retail pricing. However, dealers' actual prices may vary or change. Please confirm pricing with your dealer

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RB 400 DIRT BOSS® Description

The STIHL RB 400 DIRT BOSS® pressure washer features a powerful 196 cc (6.5 hp) engine, delivering 2,700 psi of water pressure at 2.7 gallons per minute. It’s got the power you need for heavy-duty cleaning of sidewalks, driveways, decks and more. The RB 400 DIRT BOSS® is also built to last, including a brass manifold pump design, stainless steel valves and ceramic-coated pistons. There is also a cast-iron engine liner and a built-in shutdown feature when the oil level is low. Other premium features include an easy start pump system, detergent injector system, 25' no-kink flex hose and a wide range of cleaning accessories. Optional accessories include rotary surface cleaner, water broom, nozzle options, hose extensions, gutter cleaner, aluminum wand extension, pivot coupler and official STIHL cleaning agents. If your job calls for daily power washing, the
DIRT BOSS® handles the pressure with ease. Check it out now at our Dealership.

RB 400 DIRT BOSS®

RB 400 DIRT BOSS®

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RB 400 DIRT BOSS® is rated 4.5 out of 5 by 13.

Rated 5 out of 5 by Cephus from One pullDealer told me if it needed more than two pulls to bring it back. Never had more than one pull to start. Reliable and easy to set up. Stihl, 'nuff said!

Date published: 2018-02-09

Rated 4 out of 5 by JamesMadison from What One Expects of Stihl: QualityTwo pulls. One to turnover. The second to start. A pleasure. Reliable.Pull feature might be better placed to allow pull start without tipping PW.But everything else is a joy to work with. Size, compactness, storage, performance (it goes without saying), and accessories - all top notch.The steel brace holding the axels appears to be thin or improperly supported - mine bent just a little.

Date published: 2017-12-01

Rated 5 out of 5 by Hal48 from Great pressure washer everything I wanted and moreI live in the Sierra Nevada mountains and have a few acres of cedar, pine and oak trees among others. The sap from the trees gets on everything. I had a less expensive power washer that did an ok job that I purchased when I lived in San Diego. It finally quit working. I have learned since moving to the mountains just pay a few extra dollars and get Still products. I own Still chain saws, pole saw, hedge trimmer, weed eater, backpack sprayers etc. I have never been disappointed. The power washer is just as good as my other Still products. It works perfectly, easy to start and with more than enough power to clean whatever comes its way.

Date published: 2017-09-26

Rated 4 out of 5 by Tom55 from Great looking product, good features, just got it, have to tell more later.Great looking product, good features, To new to give an honest review.

Date published: 2017-09-15

Rated 5 out of 5 by jon45 from reviewbest pressure washer that i have used. nothing at the big box stores can compare.

Date published: 2017-08-24

Rated 4 out of 5 by Tibbo from Problems on first useI used this machine for 2 hours and the pump leaked black grease. I am not happy I'm glad it's under warranty I will have to see how it holds up after the repair is made.

Date published: 2017-08-22

Rated 5 out of 5 by Jminer3624 from The power washer is easy to use, very sturdy and does a great job of cleaning surfacesThe power washer is easy to use, very sturdy and does a great job of cleaning surfaces. Love the washer.

Date published: 2017-08-02

Rated 5 out of 5 by Jass2000 from Solid reliable machineSolid, well built machine that will get the job done. Starts on the first pull. Well worth the investment.

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STIHL IS THE NUMBER ONE SELLING BRAND OF GASOLINE-POWERED HANDHELD OUTDOOR POWER EQUIPMENT IN AMERICA.*

*"Number one selling brand" is based on syndicated Irwin Broh Research as well as independent consumer research of 2009-2017 U.S. sales and market share data for the gasoline-powered handheld outdoor power equipment category combined sales to consumers and commercial landscapers.

*A majority of STIHL gasoline-powered units sold in the United States are built in the United States from domestic and foreign parts and components.